\chapter{常用对数}

\input{units/czds4-ch13-subsec1}
\input{units/czds4-ch13-subsec2}
\input{units/czds4-ch13-xiti1}

\input{units/czds4-ch13-subsec3}
\input{units/czds4-ch13-subsec4}
\input{units/czds4-ch13-subsec5}
\input{units/czds4-ch13-subsec6}
\input{units/czds4-ch13-subsec7}
\input{units/czds4-ch13-xiti2}

\input{units/czds4-ch13-xiaojie}
\input{units/czds4-ch13-fuxi}

